Aktiv OTAG Backrest and seat: Birch covered birch or beech melamine. Frame and base: Painted grey (RAL9006) Measurements: Width 43 cm, depth 45 cm, sitting height 36 %u2013 51 cm (by 2,5 cm steps), height 71-86 cm, weight 8 kg. Product description: Formpressed seat and backrest are laminated by durable coating, which doesn%u2019t easy got dirty. Design and measurements take notice of standard SFS-EN1729-1. Tested by standard SFS-EN1729-2.